EP3860741A1 - High-performance fabric for water/diesel separating filters - Google Patents

High-performance fabric for water/diesel separating filters

Info

Publication number
EP3860741A1
EP3860741A1 EP19831893.3A EP19831893A EP3860741A1 EP 3860741 A1 EP3860741 A1 EP 3860741A1 EP 19831893 A EP19831893 A EP 19831893A EP 3860741 A1 EP3860741 A1 EP 3860741A1
Authority
EP
European Patent Office
Prior art keywords
fabric
water
mesh
threads
diesel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19831893.3A
Other languages
German (de)
English (en)
French (fr)
Inventor
Paolo Canonico
Carmine LUCIGNANO
Roberto MOMENTÈ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SAATI SpA
Original Assignee
SAATI SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SAATI SpA filed Critical SAATI SpA
Publication of EP3860741A1 publication Critical patent/EP3860741A1/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D17/00Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02Separation of non-miscible liquids
    • B01D17/04Breaking emulsions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/08Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/083Filter cloth, i.e. woven, knitted or interlaced material of organic material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/08Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/086Filter cloth, i.e. woven, knitted or interlaced material of inorganic material
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/208Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based
    • D03D15/225Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based artificial, e.g. viscose
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/242Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads inorganic, e.g. basalt
    • D03D15/25Metal
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/50Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
    • D03D15/527Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads waterproof or water-repellent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2239/00Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04Additives and treatments of the filtering material
    • B01D2239/0414Surface modifiers, e.g. comprising ion exchange groups
    • B01D2239/0421Rendering the filter material hydrophilic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2239/00Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/069Special geometry of layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2239/00Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12Special parameters characterising the filtering material
    • B01D2239/1216Pore size
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2239/00Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12Special parameters characterising the filtering material
    • B01D2239/1233Fibre diameter
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/80Water
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00Inorganic fibres
    • D10B2101/20Metallic fibres
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2201/00Cellulose-based fibres, e.g. vegetable fibres
    • D10B2201/20Cellulose-derived artificial fibres
    • D10B2201/22Cellulose-derived artificial fibres made from cellulose solutions
    • D10B2201/24Viscose
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00Physical properties
    • D10B2401/02Moisture-responsive characteristics
    • D10B2401/021Moisture-responsive characteristics hydrophobic
    • DTEXTILES; PAPER
    • D10INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10BINDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00Industrial
    • D10B2505/04Filters

Definitions

  • the present invention concerns a high-performance fabric that can be used in diesel fuel filters to perform the function of separating water from a water/d iesel emulsion.
  • diesel for example diesel fuel for motor-vehicles
  • filters which comprise a square mesh fabric, the size of which is chosen so as to stop water drops.
  • the filter is typically formed by two or three filtering media with different functions; the fabric subject of this invention occupies the last filtering stage.
  • the first filtering medium is typically a non-woven fabric or paper that performs the function of filtering solid particulate.
  • the second filtering medium is also composed of similar materials appropriately surface- treated or produced using specific materials in such a way as to obtain a coalescence effect of the water droplets dispersed in the diesel, in order to simplify the subsequent blocking of said drops. In both cases, typically inexpensive materials are used, produced with a random distribution of fibrous materials and random distribution of pores.
  • the presence of narrow mesh furthermore has the drawback of lowering the flow rate of filtered diesel towards the engine, thus reducing the efficiency thereof.
  • the main object of the present invention is to provide a high- performance fabric for water/diesel separating filters which, unlike the known fabrics, has a better water/diesel separation efficiency.
  • a further object of the invention is to provide a fabric of the aforementioned type which, while having a high separation efficiency, is not an obstacle to the desired passage of diesel through the fabric, thus avoiding excessively lowering the fuel flow rate or considerably increasing the pressure drops.
  • the fabric according to the invention offers the advantage of having a higher separation efficiency, thus allowing separation of diesel with lower residual water content downstream of the filter.
  • a further advantage of the fabric according to the invention is that, while presenting a high separation efficiency, it does not unduly reduce the diesel flow rate and therefore does not compromise the engine efficiency.
  • FIG. 1 illustrates a cross-section of a modern water/diesel separation filter, provided with the fabric according to the invention
  • FIG. 1 is an operating diagram of the filter in Figure 1 ;
  • FIG. 5 illustrates the mesh of Figure 3, when obstructed by a water drop
  • FIG. 9 schematically illustrates the test bench used to determine the separation efficiency of a water/d iesel fabric
  • FIG. 12 is a graph that illustrates the relation between the specific flow of the emulsion and the pressure, for the prior art fabric and the fabric according to the invention, respectively.
  • a filter 1 for water/diesel separation is illustrated, provided with a body inside which a filtering fabric 2 is housed.
  • a diesel flow (arrow F1) is conveyed in the direction of the fabric 2, so as to obtain downstream a diesel flow F2, from which water drops 3 present in the upstream flow F1 have been filtered out.
  • the mesh 4 of the fabric 2 is square and is composed of threads 5 that form the respective sides 6 of the square mesh 4.
  • the free surface of said prior art mesh 4, illustrated in Figures 4a and 4b, is calculated as a percentage ratio between the surface of the smaller square 7, comprised between the profile or the inner edge of the threads 5 forming the sides 6 of the mesh 4, and the surface of the larger square 8, measured as far as the centre line of the thickness of said threads 5.
  • the described obstruction of the prior art square mesh 4 increases the pressure losses on the filtering fabric, with consequent increase in the energy required to maintain the same diesel flow rate to the engine.
  • the fabric 25 according to the invention has rectangular mesh 1 1 , having a longer side 12 and a shorter side 13 ( Figure 6).
  • the free surface of the mesh 11 is calculated as a percentage ratio between the surface of the smaller rectangle 14, measured between the profile or the edge of the threads 26,27 facing the inside of the mesh 1 1 and forming the respective sides thereof 12,13, and the surface of the larger rectangle 15, the latter measured as far as the centre-line of the thickness of the cited threads 26,27.
  • the sides of the rectangular mesh of the fabric according to the invention are such that the ratio between the shorter side and the longer side is comprised between 0.38 and 1.
  • the fabric of the invention is obtained by weaving threads 26, 27 consisting of a synthetic monofilament or multifilament with diameter of 10-90 pm, in which the shorter side of the fabric mesh has a length varying from 5 to 150 pm.
  • said threads 26, 27 are made of a synthetic technopolymer belonging to the family of polyesters, polyamides, polyary letherketones, polyparaphenylene sulfides, polypropylenes, perfluorocarbons, polyurethanes, or polyvinyl chlorides.
  • said threads consist of an artificial polymer belonging to the cellulose or viscose family.
  • the fabric of the invention can also be made of metal yarn.
  • the fabric of the invention can be used as is or implemented with a fluorocarbon or silicone water-repellent and/or water-/oil-repellent treatment.
  • the threads 26, 27 forming the fabric of the invention have a diameter that varies from 10 pm to 90 pm in one or in both warp and weft directions.
  • the fabric of the invention can furthermore be produced with a textile construction requiring a number of threads per cm that varies from 23 to 350.
  • the fabric can be produced by means of different textile architectures and using threads of different types or different diameters in weft and warp.
  • the mesh opening of the fabric subject of the invention can have a short side ranging from 5 to 150 pm.
  • the invention it is furthermore possible to produce rectangular mesh 11 with a shorter side 13 even shorter than the side 6 of the square mesh 4 of the prior art fabrics 2, thus further increasing the separation efficiency of the fabric 25 according to the invention.
  • the smallest size of the rectangular mesh must obviously be such as not to allow the passage of any deformed drop.
  • the size of the longer side of the rectangle cannot be infinite since, obviously, once the drop has deformed it will tend to pass through the long side of the rectangular mesh. Therefore, the ratio 0.38 - 1 between the size of the shorter side 13 and that of the longer side 12 of the rectangle 11 is defined within the cited range, as a function of the filter operating parameters.
  • the separation efficiency is inversely proportional to the mesh size and directly proportional to the free surface. It follows that, by adjusting the rectangular mesh with a ratio, between longer and shorter sides, comprised between 0.38 and 1 , it is possible to optimize the filter separation efficiency. For example, a rectangular mesh with sides of 23 x 25 pm (and therefore ratio 0.92) has a separation efficiency of 35% if tested with a specific flow rate of 3.33 l/h/cm 2 and drop size of 20 pm. On the other hand, a rectangular mesh with sides of 15 x 21 pm (and therefore ratio 0.7) has a separation efficiency of 48% if tested with a specific flow rate of 3.33 l/h/cm 2 and drop size of 20 pm.
  • Figure 9 illustrates a diagram of a test bench for measuring the separation efficiency of the prior art fabric 2 and the fabric 25 according to the invention, calculated as a percentage ratio between the volume of water stopped by the filtering fabric and the total volume of water present in the water/diesel emulsion delivered towards the fabric
  • the test is carried out according to the IS016332 standard and entails the passage of an emulsion 17 of water 3 and diesel 9 through a filtering fabric 2,25. Water 18 separated in the stage 19 upstream of the fabric is collected in a suitable measuring device 20.
  • the prior art fabric 2 is formed of square mesh having size of 18 x 18 pm and a free surface of the mesh of 18%;
  • the fabric 25 according to the invention is formed of rectangular mesh having size of 15 x 20 pm and a free surface of the mesh of 22%.
  • the test was carried out at a specific water/diesel emulsion flow rate of 30 l/h on a sample of filtering fabric with surface of 9 cm 2 (specific flow rate of 3.33 l/h/cm 2 ), with varying dimensional distribution of the water drop.
  • the reference number 21 shows the separation efficiency value achieved by the square mesh fabric 2 of the prior art, whereas 22 shows the separation efficiency value of the rectangular mesh fabric 25 according to the invention.
  • the separation efficiency is 45% for the prior art fabric 2 and 51 % for the fabric 25 according to the invention
  • the separation efficiency is 59% for the prior art fabric 2 and 66% for the fabric 25 according to the invention
  • the separation efficiency is 78% for the prior art fabric 2 and 82% for the fabric 25 according to the invention.
  • the graphs in Figure 11 show the results of the tests carried out on a prior art square mesh fabric and a rectangular mesh fabric according to the invention, of the type already described with reference to the test in Figure 10. This time the test was carried out maintaining the dimensional distribution of the water drops constant at a value of 30 pm, and varying the specific flow rate of the water/diesel emulsion instead.
  • the reference number 23 shows the separation efficiency curve for the square mesh fabric 2
  • 24 shows the separation efficiency curve obtained using the rectangular mesh fabric 25 according to the invention.
  • the separation efficiency is 50% for the prior art fabric 2 and 57% for the fabric 25 according to the invention.
  • the pressure drop on the fabric according to the invention is smaller than the pressure drop on the prior art fabric.
  • the fabric according to the invention provides a pressure drop of 1.70 kPa, whereas the prior art fabric provides a pressure drop of 1.98 kPa;
  • the fabric according to the invention provides a pressure drop of 3.92 kPa whereas the prior art fabric provides a pressure drop of 4.89 kPa.
  • Figure 12 illustrates the trend of the cited specific flow/pressure curves, (I) for the rectangular mesh fabric according to the invention and (PA) for the prior art square mesh fabric, respectively.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filtering Materials (AREA)
  • Woven Fabrics (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
EP19831893.3A 2018-12-03 2019-11-29 High-performance fabric for water/diesel separating filters Pending EP3860741A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000010762A IT201800010762A1 (it) 2018-12-03 2018-12-03 Tessuto ad alta prestazione per filtri di separazione acqua/gasolio.
PCT/IB2019/060308 WO2020115625A1 (en) 2018-12-03 2019-11-29 High-performance fabric for water/diesel separating filters

Publications (1)

Publication Number Publication Date
EP3860741A1 true EP3860741A1 (en) 2021-08-11

Family

ID=65767195

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19831893.3A Pending EP3860741A1 (en) 2018-12-03 2019-11-29 High-performance fabric for water/diesel separating filters

Country Status (7)

Country Link
US (1) US20210394085A1 (zh)
EP (1) EP3860741A1 (zh)
JP (1) JP2022520308A (zh)
KR (1) KR20210090169A (zh)
CN (1) CN113164845B (zh)
IT (1) IT201800010762A1 (zh)
WO (1) WO2020115625A1 (zh)

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Publication number Priority date Publication date Assignee Title
EP4392604A1 (de) 2021-08-27 2024-07-03 Groz-Beckert KG Webblatt und verfahren zur herstellung eines webblatts
DE102021122217A1 (de) 2021-08-27 2023-03-02 Groz-Beckert Kommanditgesellschaft Webblatt und Verfahren zur Herstellung eines Webblatts
DE102021122220A1 (de) 2021-08-27 2023-03-02 Groz-Beckert Kommanditgesellschaft Webblatt und Verfahren zur Herstellung eines Webblatts
WO2024009174A1 (en) * 2022-07-06 2024-01-11 Saati S.P.A. Improved textile protective element for use in acoustic components of electronic devices and acoustic component provided with this element inside
WO2024100550A1 (en) * 2022-11-08 2024-05-16 Saati S.P.A. Synthetic monofilament open-mesh filter fabric with asymmetric construction for liquid/solid filtration having low loss of load and facilitated regeneration capacity

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US5944197A (en) * 1997-04-24 1999-08-31 Southwestern Wire Cloth, Inc. Rectangular opening woven screen mesh for filtering solid particles
US6510947B1 (en) * 1999-11-03 2003-01-28 Varco I/P, Inc. Screens for vibratory separators
US6458283B1 (en) * 1999-11-03 2002-10-01 Varco I/P, Inc. Lost circulation fluid treatment
US6237780B1 (en) * 1999-11-03 2001-05-29 Tuboscope I/P, Inc. Vibratory separator screens
US6457588B1 (en) * 1999-11-03 2002-10-01 Varco I/P, Inc. Treatment of fluid having lost circulation material
IT248285Y1 (it) * 1999-11-08 2002-12-16 Ufi Universal Filter Int Spa Filtro per carburante.
GB0308475D0 (en) * 2003-04-12 2003-05-21 United Wire Ltd Filtering screen
CA2949283A1 (en) * 2014-05-28 2015-12-03 Basf Se Mesh comprising a surface of hydrated aluminum oxides and their use for oil-water separation
CN107250523A (zh) * 2015-02-27 2017-10-13 曼·胡默尔有限公司 用于从液体中分离出至少一种不期望的流体的分离设备、分离设备的膜、过滤器、过滤元件以及液体系统
DE102015010082A1 (de) * 2015-08-07 2017-02-09 Mann+Hummel Gmbh Wasserabscheideelement
CN105056618A (zh) * 2015-08-12 2015-11-18 九江新恒机械制造有限公司 一种油水分离器
CN105688514A (zh) * 2016-03-21 2016-06-22 西安天厚滤清技术有限责任公司 用于油品过滤的聚酰胺滤材和滤芯
EA201991326A1 (ru) * 2016-12-16 2020-01-17 Басф Се Сито с покрытием и его применение, в частности, для сепарации воды от нефти

Also Published As

Publication number Publication date
WO2020115625A1 (en) 2020-06-11
CN113164845A (zh) 2021-07-23
CN113164845B (zh) 2023-02-17
IT201800010762A1 (it) 2020-06-03
KR20210090169A (ko) 2021-07-19
JP2022520308A (ja) 2022-03-30
US20210394085A1 (en) 2021-12-23

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